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ASF GitHub Bot commented on PARQUET-2075: ----------------------------------------- wgtmac commented on PR #1014: URL: https://github.com/apache/parquet-mr/pull/1014#issuecomment-1382815489 > > * I'd prefer creating a new JIRA for this refactor to be a prerequisite. Merging multiple files to a single one with customized pruning, encryption, and codec is also in my mind and will be supported later. I will create separate JIRAs as sub-tasks of PARQUET-2075 and work on them progressively. > > Perfect! :) > > > * Putting the original `created_by` into `key_value_metadata` is a good idea. However, it is tricky if a file has been rewritten for several times. What about adding a key named `original_created_by` to `key_value_metadata` and concatenating all old `created_by`s to it? > > It sounds good to me. Maybe have the latest one at the beginning and use the separator `'\n'`? I am afraid some implementations may drop characters after `'\n'` when displaying the string content. Let me do some investigation. > Unified Rewriter Tool > ----------------------- > > Key: PARQUET-2075 > URL: https://issues.apache.org/jira/browse/PARQUET-2075 > Project: Parquet > Issue Type: New Feature > Reporter: Xinli Shang > Assignee: Gang Wu > Priority: Major > > During the discussion of PARQUET-2071, we came up with the idea of a > universal tool to translate the existing file to a different state while > skipping some level steps like encoding/decoding, to gain speed. For example, > only decompress pages and then compress directly. For PARQUET-2071, we only > decrypt and then encrypt directly. This will be useful for the existing data > to onboard Parquet features like column encryption, zstd etc. > We already have tools like trans-compression, column pruning etc. We will > consolidate all these tools with this universal tool. -- This message was sent by Atlassian Jira (v8.20.10#820010)